Extended Strong's Hebrew Lexicon (Brown-Driver-Briggs based)
Madai
Usage: A man living at the time of the Patriarchs, first mentioned at Gen.10.2; son of: Japheth (H3315); brother of: Gomer (H1586), Magog (H4031), Javan (H3120), Tubal (H8422), Meshech (H4902) and Tiras (H8494) § Media or Medes or Madai = "middle land" 1) a people descended from the son of Japheth and who inhabited the territory of Media 2) land inhabited by the descendants of Japheth;
located northwest of Persia proper, south and southwest of the Caspian Sea, east of Armenia and Assyria, and west and northwest of the great salt desert of Iram